Payjoin Dev Kit has some funding from the first wave of OpenSats grants but not from Spiral or to the same level. The Rust Dev Kit idea is a great one for building a correct, easy to use API that can be embedded every where and was sorely missing for payjoin.

If you like what you see you can donate straight from your Stacker news wallet to the the geyser campaign or the payjoin endpoint shown there: https://geyser.fund/project/payjoin/